<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/xhtml"
      xmlns:th="http://www.thymeleaf.org"
      xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3">
<head>
    <meta charset="UTF-8" />
    <title>Spring Security Example</title>
</head>
<body>
    <div th:if="${param.error}">用户名或密码错误</div>
    <div th:if="${param.logout}">你已经注销</div>
    <form th:action="@{/login}" method="post">
        <div>
            <label>用户名:<input type="text" name="username" /></label>
        </div>
        <div>
            <label>密码:<input type="password" name="password" /> </label>
        </div>
        <div><input type="submit" th:value="登录" /></div>
    </form>
</body>
</html>